I have a tangent, pc and point on curve, but I can't seem to find the routine to draw a curve through a point. There is a plethora of arc commands including one for through a point if you have two tangents, but I can't seem to narrow done which routine to use for my situation.
Thanks
I Can Get Close By Construction
But see no combination of Carlson commands and snap settings that can get it exactly.
Paul in PA
Try polyline > "a" for arc , pick pc, "s" for second point, pick point on curve, pick pt.
I Can Get Close By Construction
Yeah, me neither, kind of suprising with all of the options. I could calculate it, but got around it by opening the drawing up in Land Desktop.
In this case I only have a tangent, the pc point and one point on curve, so I don't think that will work unless I had a second point on the curve. In LDD you can select draw curve from end of object, select the tangent and when it prompts for the radius just click the point. It's a handy routine for quickly creating a tangent curve through a point.
Do a bearing-bearing intersection at 90° from the tangent at the P.C. and 90° from the mid point of the chord from the P.C. to the P.O.C.
I don't know about carlson but with autocad you can draw it with the arc command.
Draw a straight line over your tangent, ending at the pc.
Then draw an arc but don't select your beginning point, just hit "enter" and it will give you a continuation of the line you just drew. Then click on your point on curve.
Don't forget to erase the portion of line you drew over the tangent.
James
I have submitted this curve combination into programming as a future command idea.
That worked perfect. An extra step with re-drawing the tangent, but exactly what I was looking for after that. Thanks
Thanks. Found a work around above, but the added routine would be nice.
Glad I could help.
I get so much from this board. It's not often I have the opportunity to give back.
James
If what you are looking for is the old AutoCAD "Draw Arc by start, end, direction", then all you need to do is enter _arc on the command line and follow the prompts.